f6e09e537b
I've put some work into the Google Benchmark library in order to make it easier to benchmark libc++. These changes have already been upstreamed into Google Benchmark and this patch applies the changes to the in-tree version. The main improvement in the addition of a 'compare_bench.py' script which makes it very easy to compare benchmarks. For example to compare the native STL to libc++ you would run: `$ compare_bench.py ./util_smartptr.native.out ./util_smartptr.libcxx.out` And the output would look like: RUNNING: ./util_smartptr.native.out Benchmark Time CPU Iterations ---------------------------------------------------------------- BM_SharedPtrCreateDestroy 62 ns 62 ns 10937500 BM_SharedPtrIncDecRef 31 ns 31 ns 23972603 BM_WeakPtrIncDecRef 28 ns 28 ns 23648649 RUNNING: ./util_smartptr.libcxx.out Benchmark Time CPU Iterations ---------------------------------------------------------------- BM_SharedPtrCreateDestroy 46 ns 46 ns 14957265 BM_SharedPtrIncDecRef 31 ns 31 ns 22435897 BM_WeakPtrIncDecRef 34 ns 34 ns 21084337 Comparing ./util_smartptr.native.out to ./util_smartptr.libcxx.out Benchmark Time CPU ----------------------------------------------------- BM_SharedPtrCreateDestroy -0.26 -0.26 BM_SharedPtrIncDecRef +0.00 +0.00 BM_WeakPtrIncDecRef +0.21 +0.21 llvm-svn: 278147
46 lines
901 B
JSON
46 lines
901 B
JSON
{
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"context": {
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"date": "2016-08-02 17:44:46",
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"num_cpus": 4,
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"mhz_per_cpu": 4228,
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"cpu_scaling_enabled": false,
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"library_build_type": "release"
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},
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"benchmarks": [
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{
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"name": "BM_SameTimes",
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"iterations": 1000,
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"real_time": 10,
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"cpu_time": 10,
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"time_unit": "ns"
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},
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{
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"name": "BM_2xFaster",
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"iterations": 1000,
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"real_time": 25,
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"cpu_time": 25,
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"time_unit": "ns"
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},
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{
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"name": "BM_2xSlower",
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"iterations": 20833333,
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"real_time": 100,
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"cpu_time": 100,
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"time_unit": "ns"
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},
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{
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"name": "BM_10PercentFaster",
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"iterations": 1000,
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"real_time": 90,
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"cpu_time": 90,
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"time_unit": "ns"
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},
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{
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"name": "BM_10PercentSlower",
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"iterations": 1000,
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"real_time": 110,
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"cpu_time": 110,
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"time_unit": "ns"
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}
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]
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} |